.tabx-tab-content {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    visibility: hidden;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.tabx-tab-content.tabx-tab-content-active {
    visibility: visible;
    z-index: 2;
}

.tabx-tab-content-frame {
    position: absolute;
    top: 0;
    bottom: 0;
    right: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 100%;
}